Halo - New Perspectives on the Biogeochemical Cycles of Ozone Depleting Halogenated Compounds

The major objective is to determine the emission of marine naturally produced trace gases, so called volatile halogenated organic compounds or halocarbons, to the atmosphere. Several of these compounds have been identified as ozone-depleting and are subject to regulation under international agreements. Global budgets of naturally produced halocarbons exist and key substances have been identified as well as key mechanisms. However, one major knowledge gap remain: Exchange processes in ice-covered seas.

The aim is to examine the physical and biogeochemical sea-ice-air fluxes during sea-ice growth and their impacts on Arctic tropospheric chemistry in the Arctic, as well as the mechanisms of the formation of the halocarbons.

The formation mechanisms were investigated with Raman spectroscopy with multivariate evaluation.